Large-scale circulation model for turbulent Rayleigh-Benard convection

被引：121

作者：

Brown, Eric ^{[1
]}

Ahlers, Guenter

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, iQCD, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.98.134501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A model for the large-scale-circulation (LSC) of turbulent Rayleigh-Benard convection in cylindrical samples is presented. It consists of two physically motivated stochastic ordinary differential equations, one each for the strength and the azimuthal orientation of the LSC. Stochastic forces represent phenomenologically the influence of turbulent fluctuations. Consistent with measurements, the model yields an azimuthally meandering LSC with occasional rotations, and with more rare cessations. As in experiment, cessations have a uniform distribution of LSC orientation changes.

引用

页数：4

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